Apparatus for molding concrete building units



W. E. NELSON APPARATUS FOR MOLDING CONCRETE BUILDING UNITS March 10. 1925.

Filed Aug. 28, 1922 2 Sheets-Sheet 1 Suva VIM WET/1M9 m Gnome/11o March 10. 1925. 1,529,079

- w. E. NELSON APPARATUS FOR HOLDING CONCRETE BUILDING UNITS Filed-Aug. 2a, 1922 2 Sheets-Sha a 2 awwwtoc Qmmm J 2% .2: vzza'an M WOMW Patented Mar. 10, 1925.

UNITED STATES PATENT OFFICE.

APPARATUS FOR MOLDING CONCRETE BUILDING UNITS.

Application filed August 28, 1928. Serial No. 584,833.

To all whom it may concern:

Be it known that I, WILLIAM E. NELSON, a citizen of the United States, residing at Washington, District of Columbia, have invented certain new and useful Improvements in Ap aratus for Molding Concrete Building Units; and I do declare the'following to be a full, clear, and'exact description of the invention, such as will enable others skilled in the art to which it appertains to makeand use the same.

The present invention has reference to the manufacture of concrete building units, being an im roved apparatus for molding concrete buil ing units.

In molding concrete building and other units, it is expeditions to pack the molds which are used with liquid concrete adjacent the place where the cementitious mixture is made, and then to move the molds packed with liquid concrete to a place where they will be undisturbed until the concrete has set. Heretofore, it has been the custom to pack the molds tightly in the first instance with li uid concrete. This, of course, requires consi erable time and the expenditure of labor, all of which can be to a large extent entirely eliminated by putting the present invention into practice, as according to the present invention, the molds may be packed loosely with liquid concrete which will be caused to settle as the molds are moved from the place where theyare filled to a place where the concrete may be allowed to set. This simplified method may be carried out by mounting the molds as hereinafter described upon supporting wheels, the peripheries of which are provided with depressions or other means which cause the molds as they are rolled from place to place upon the wheels to be jolted.

The novelty in the invention resides in the various features of construction, and the combination and arrangement of parts, all of which are hereinafter fully described and claimed.

The descriptive matter of this specification is sup lemented by the accompanying drawings w ich are intended for illustrative purposes onl but which incidentally illustrate the meo anical construction of a molding apparatus in which the novel features of the present invention are embodied.

In the drawings Fig. 1 is a longitudinal'sectional view of the molding apparatus taken substantially on the plane indicated by the line 1-1 of Fig.2;

1g. 2 is a top plan view of the apparatus, showin it broken away in parts and also partly fil ed with concrete;

Fig. 3 is a transverse sectional view of the apparatus taken substantially on the plane indicated b the line 33 of Fig. 2;

Fi 4 is a si e elevation of one of the whee s upon which the mold proper is supported; and

Fig. 5 is a transverse sectional view of one of the supporting wheels 'of the mold, sa1d view being taken substantially on the plane indicated b the line 55 of'Fig. 4:.

The apparatus orming the subject matter of the present invention consists essentially of a mold proper and a plurality of wheels for supporting) the mold proper and for permittlng it to e easily rolled from place to place.

The mold proper'is constructed very much on the order of the mold disclosed and claimed in the pending application of William E. Nelson, Serial No. 404,520,.filed August 19, 1920, since it consists of a flat substantiall rectangular platform 1, around the four e ges of which are arranged upstanding ledges 2, and a rectangular-shaped set 3 of interlocking mold members. The set of interlocking mold members rests up on the platform 1 and is arranged within the rectangular frame formed by the upstanding ledges 2. The mold proper illustrated in the drawings is intended to be used in molding a plurality of concrete building units, which in turn are intended to be used in the erection of monolithic concrete building structures similar to the ones disclosed and claimed in the pending application of William E. Nelson, Serial No. 421,139, filed Nov. 1, 1920. It is to be pointed out, however, that ,the mold proper may be constructed other than as just described and as illustrated in the drawin s, since the novelty in the apparatus resi es in the combinatlon of a mold and the particular type of supporting wheels for the mold.

The platform 1 is preferably made of metal and is braced by longitudinally extending channel irons 4 and angle irons 5. These members arerivetedto the lower side of the platform 1.

,Riveted or otherwise suitably secured to the downwardly extending portions or sides of-the angle irons -are depending le'gs6.

The legs 6 are arranged in oppositely disposed or! alined pairs, one palr being 10- cated adjacent each end of the platform 11,

If desired, the legs 6 maybebraced by suit' place to place. If'desired. the wheels 8 may .around the peripheries of'the wheels, and.

the portions of t run upon a track, in which -case 'tl1ey are flireferably provided withrail-engaging.

anges 9.

Formed upon the peripheries or tread portions of the wheels 8 are jogging elements. These are arranged in spaced intervals e peripheries of the wheels between the jogging elements? are smooth and arcuate. l

ments are in the form of depressions 10,

and in the present instance, the periphery of each .wheel is provided with four of the,

depressions 10 which are spaced equal distances apart and the portions of the periphery between the adjacent depressions are smooth and arcuate. The depressionslO' or other jogging elements arranged as they are in spaced relation around the peripheries of the wheels with smooth eripheral portions between the adjacent epressions or elements cause the wheels to impart to the mold a series of sudden'jolts of short dura-- tionas the mold is rolled upon the wheels from place to place; This joltii g, intermittentas it is, causes any liquid concrete that there is in the mold to gradually settle toward the bottom of the'mold- The apparatus described in the foregoingiand illustrated 'inqthe; drawings is 111- tended to be used in a plant where the concrete out of which the building units are made is mixed and poured into the molds at one lace and then the molds filled with liqui concrete. are moved to kilns or suitable drying places to permit the concrete to set. By the use of the apparatus, the

mold proper may be quickly filled at the concrete mliier, and in filling it, it is the intention .to only ack the liquid concrete loosely in the moldlsine while it is being rolled from'the concrete mixer to the dryreferably, the jogging eleh de ressions ing-kiln or place, the intermittent jolti caused by the depressions 10 in the whee s 8 will cause the concreteto settle in the mold.

After the concrete has settled in the mold,

in s the construction use and advanta es of the invention will be readily understood. It is obvious that numerous changes in form, roportion, and in the various details ot construction, may be made without departing from the principles of the invention or sacrificing any of ,the' advantages thereof, and hence, it is to be understood that certain changes may be made within the meaning and scope of the appended claims.

'What is claimed is:

porting car comprising a mold which in- 1. A combined concrete mold and trans-.

cludes a' platform, wheels 'mounted on said mold beneath said platform and upon which the mold may be moved from the place 7 where it is filled to a place where-the concrete may dry, said wheels having their peripheries provided with depressions, said eing disposed at spaced'interva around the peripheries of said wheels and the ortions of the peripheries of said wheels etween said depressions being smooth and arcuate whereby to intermittently impart sudden jolts of short duration to said mold is it is rolled upon said wheels from place to place.

2..An apparatus for molding concrete building units, comprising a mold, supporting Wheels mounted underneath said mold and upon which said mold may be rolled from place to place, and jogging elements formed upon the peripheries of said wheels,

.said jogging elements being disposed at spaced intervals around the peripheries of said wheels and the portions of the peripheries of said wheels between adjacent elements being smooth whereby to intermittently impart sudden jolts of short duration to said mold as the letter is rolled upon said wheels from place to place. 7

In testimony whereof I have hereunto aflixed my signature.

WILLIAM NELSON. I 

